Improved glass-mould



diluted ndr aan; eine Leiters Patent No. 93,591, dated Augustv 10, 1869.` l.

IMPROVED GLASS-MOULD.

The Schedule referred ti in these Letters Patent and making part cf the same.

To all 'whom it may concern Be it knownvthat I, HOMER BROOKE, of the city,

V county, and State of New York, have invented a new and useful Improvement in Glass-Moulds,ofwhich the following is a full, clear, and exact description, reference being had to theaccoinpanying drawing, forming part of this specification, and in which- Figure l represents a plan of a glass-mould, constructed in accordance with my improvement;

Figure 2, a vertical sectionl of the same, taken mainly as indicated by the line a; :c in fig. l; and

Figure 3 a transverse section of a glass jar-lid as made by my improved mould, constructed according to the modification shown in the drawing.

Similar letters of reference indicate corresponding parts.

In moulding various` articles of glass, in which-adepression or depressions are to be made within a surrounding rim or outer portion, as, for instance, glass lids or covers to preserve and other jars formed with an annular cavity in them, to receive within it the mouth or upper edge of the jar, there is great liability of such outerrim or surrounding portion shrendingf chrisling, ory cracking, from the too rapid cooling of such portion, and absence ot' suitable provision for contraction of the glass on the inner edge or surface of the same. a

One of the objectsof my invention is to remove this liability. g

It also insuresvthe cavity or cavities being of the required or uniform depth; and where, owing to the structure of the article, there is any tendency to warp, provides, or may provide, a suitable support for the prevention of the same, besides securing other advantages.

lo attain these ends, in pait or in whole, my invention consists -in such a sectional constructionof the mould, and t of the one section within the other,'as that the glass, while in the mould, may have its recessed portion, hereinbefore -referred to, relieved, in advance ofthe outer rim or surrounding portion, from contact with the heated mould, by motion given to the one section ofthe latter relatively to the other section thereof, and provision also be formed, where required, for support of the article in the mould, when so relieved, both externally and internally relatively to such recess or recesses in the article; and, likewise, so that any surplus glass put into the mould is prevented from hein forced into the said recess or recesses to diminish heirv depth; and, in certain articles, the outer central surface exposed, to a cooling action, while the oy or made to fit through the other section, of outlets or passages for the escape of dirt and oil, or extraneous matter, passing down between the joint of the sections, and, unless thus allowed to escape, interfering with the stroke of the movable or relieving-section of the mould' relatively to the other section, and which would necessarily produceirregularity in the work.

The mouldl'represeuted in the accompanying draw-A I 'ing is of a form suitable for making glass lids or covers to preserve'and other jars, substantially of the description represent-ed in fig. 3, and which, being well known, may here be briefly .described as consistingof an under central plng-portion, a, which enters the mouth ot' the jar, an annular :groove or cavity la to receive within it the mouth-edge of the jar, and an outer or surrouinling-rim, c, to, bear down 011 a gasket-packing, arranged to surround the neck of the jar ata slight distance below its mouth.

lVhile a mould of' this description has been selected to illustrate my invention, the form ofthe mould may, of course, be changed according to the article required to be made; but the manufacture of such a glass lid or cover serves to clearly explain the several advantages which are or may be attained by my improve-v ment, hence the following description will be restricted to such a mould.

The general operation is as usual, that is to say, a suitable quantity of glass, in a plastic state,`to forni a lid is put ou to the heated mould, and the latter slid, by its handle, d, over a bed or table under a plunger, which, coming down, presses the glass into the mould that, in connection with the pressing-surface of the plunger, gives to the lidA its required form.

Usually the lid is made bottom-side uppermost, the plunger being constructed with an ,annularrim, that sinks the annular groove b in the lid. This gives no room for escape of surplus glass from under the plunger, so that the depth of thc groove l1 is apt to vary or, be shallower than will admit of the llid coming down fairly upon the gasket, applied to the jar to secure a close tit.

Such defect is avoided by my invention, the lid being pressed top side uppermost in the mould, th( t is'made Aup of a. main section, A, and inner concentric annular section, B, arranged to have vertical play, the one `within or through the other, preferably the annular' section B plays up and down through the top surface ofthe main section A, while the latter rests upon `the table; but this, by a suitable construction, may bereversed to produce the same effect, that is, the annular section B made th lie upon'v the table of the press while the main section A is moved up or down.

- The arrangement shown in the drawing shows the section B as being the movingone.

This inner section is of annular form, and is fitted to work freely up and down through au annular opening, c, in the upper port-ion of the outer or main seetion A, that may be madel of an upper and lower part, secured together by screws ff, and that may have vertical slots or side openings gg in it, to allow of arms 1th, of or from the inner or annular section, project-ing through the outer or main section, to effect lift or drop of the annular' section.

',lhe depressions and surfaces Ii, 7.', and 'm of the nain section A ot' the mould serve, in conjunction with the pluugerof the press, to give the general conligurationto the lid, while the annular section B, when raised, forms the annular groove b in the lid.

Immediately, however, after pressure has been applied, to thus mould the lid, the annular section B is lowered, as represented by red lines in g. 2.

This removes all obstructions to the contraction of' the Vrim c oi' the lid, establishes a rest for the plugportion a and rim c, to prevent; warping, and allows of the. rim c gradually cooling or setting in the heated mould, while, by the retiring of the plunger, the outer and upper central portion ofthe lid, which has worked into it any surplus glass that may, have been put'into the mould, is unbound and exposed to the cooling intluence of the air.

In this way, all shrending of the rim c is avoided, the groove b made of uniform depth, and the several other advantages hercinbet'ore specified obtained.

The annular' section l5 may be raised and lowered, at the propel' periods, by causing the arms h h, to ride over and leave inclined projections on the press-bed as the mould is run under and away from the plunger,

or it may be raised ami lowered by other means, either having a straight or spiral action.

In case ofthe main section A being made the rising and falling one, the actim'will he reversed, that is, it will have to rise instead of falling when it is required' to leave the groove b free from contact with the mould, while the rim c and plug-portion a remain in contact with it.

Such act-ion of the sectional mould is in no way analogous to a lnere rising and fallingt support to the rim of the lid that does not leave the rim proper embedded in the mould, and, when raised, leaves the plug-portion of the lid unsupported, Aand which only serves as a handle or means for lifting the lid out of the mould.

As, in the working of such\a-'seetional lnould, dirt will unavoidably pass down at the joint established by the annular opening c in the main section, and it may be. frequently necessary to apply oil to such part, the accumulation of such oil and dirt beneath the rising and falling section would, in course ot' time, impede its working and shorten its stroke. which would produce irregularity in the work.

To provide against this, I provide outlets or passages within or through the stationary section for the escape ot' such matter, as, for instance, by forming a channel, n, around the base of the central portion of the main section, and clearance apertures or openings vr yr leading theretiom through the grooved plate or portion of said section.

What is here claimed, and desired to be secured by Letters latent, is

1. A glass-mould, t'or forming articles having one or more depressions in them, made in sections, as described, aml so that the one section, which has a rising and falling motion, will leave the depressions l'ree ti'om contact with the mould, while the outer surrounding portion to such cavity or cavities remains embedded in, and continues supportedy on the mould, substantially as and for the purpose or purposes herein set forth.

2. vlhe combination, with sectional mould, constructed to operate substantially as descrilwd, ofv a clearance channel, or passage or passages, arranged in relation to the joint established i'or play ot'vthe one mould-section through the other, to provide for the escape ot' dirt and oil, essentially as specified.

3. The sectional mould A l, constructed substantially as shown and described.

HOMER BROOKF.

Witnesses:

.l Amas J. CAMPBELL, J. W. Coouns. 

